444 Stainless Steel Plate/Sheet Details
Overview
444 stainless steel plate/sheet is a ferritic stainless steel with excellent corrosion resistance, particularly in chloride environments, and good resistance to oxidation and scaling at elevated temperatures. It is stabilized with additions of titanium and niobium, which enhance its resistance to intergranular corrosion and improve its mechanical properties.
Key Characteristics
Excellent Corrosion Resistance: Provides superior resistance to pitting and crevice corrosion in chloride environments.
Oxidation Resistance: Maintains good oxidation resistance at high temperatures, making it suitable for heat-exposed applications.
High Strength and Ductility: Offers a good balance of strength and ductility, allowing for ease of fabrication and forming.
Stabilized Composition: Additions of titanium and niobium enhance resistance to intergranular corrosion and improve weldability.
Magnetic Properties: Exhibits magnetic properties in both the annealed and cold-worked conditions.
Chemical Composition
Carbon (C): ≤ 0.025%
Manganese (Mn): ≤ 1.00%
Silicon (Si): ≤ 1.00%
Phosphorus (P): ≤ 0.040%
Sulfur (S): ≤ 0.030%
Chromium (Cr): 17.5-19.5%
Nickel (Ni): ≤ 0.50%
Molybdenum (Mo): 1.75-2.50%
Titanium (Ti): ≤ 0.80%
Niobium (Nb): ≤ 0.80%
Common Applications
Automotive Components: Used in automotive exhaust systems, manifolds, and other components exposed to high temperatures and corrosive environments.
Water Heater Tanks: Ideal for use in water heater tanks due to its excellent resistance to pitting and crevice corrosion.
Heat Exchangers: Suitable for heat exchangers and other equipment where good thermal conductivity and corrosion resistance are required.
Architectural Applications: Employed in architectural applications such as building facades and structural components for its aesthetic appeal and durability.
Food Processing Equipment: Used in food processing and handling equipment for its corrosion resistance and ease of cleaning.
Advantages
Superior Corrosion Resistance: Provides excellent resistance to pitting and crevice corrosion, especially in chloride-containing environments.
Good Oxidation Resistance: Maintains structural integrity and appearance at high temperatures, offering reliable oxidation resistance.
Enhanced Mechanical Properties: Stabilized with titanium and niobium, providing improved mechanical properties and resistance to intergranular corrosion.
Good Formability and Weldability: Easy to form, bend, and weld, making it versatile for various fabrication processes.
Magnetic Properties: Magnetic in both annealed and cold-worked conditions, useful for specific applications requiring magnetic properties.
Summary
444 stainless steel plate/sheet is a high-performance material designed for applications requiring superior corrosion resistance, particularly in chloride environments, and good oxidation resistance at high temperatures. The stabilized composition with titanium and niobium enhances its mechanical properties and resistance to intergranular corrosion, making it suitable for automotive components, water heater tanks, heat exchangers, architectural applications, and food processing equipment.
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